Results 11 to 20 of about 6,971,566 (340)
General properties of the decay amplitudes for massless particles [PDF]
Nuclear Physics B, 1996 We derive the kinematical constraints which characterize the decay of any massless particle in flat spacetime. We show that in perturbation theory the decay probabilities of photons and Yang-Mills bosons vanish to all orders; the decay probability of the graviton vanishes to one-loop order for graviton loops and to all orders for matter loops.
Gaetano Fiore, Giovanni Modanese
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HADRONIC B DECAYS: A GENERAL APPROACH [PDF]
International Journal of Modern Physics A, 2007 In this paper, we propose a general approach for describing hadronic B decays. Using this method, all amplitudes for such decays can be expressed in terms of contractions, though the matrix elements are not evaluated. Many years ago, Buras and Silvestrini proposed a similar approach. However, our technique goes beyond theirs in several ways. First, we
Maxime Imbeault +2 more
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Ultrafast generation and decay of a surface metal [PDF]
Nature Communications, 2021 AbstractBand bending at semiconductor surfaces induced by chemical doping or electric fields can create metallic surfaces with properties not found in the bulk, such as high electron mobility, magnetism or superconductivity. Optical generation of such metallic surfaces on ultrafast timescales would be appealing for high-speed electronics.
Sesha Vempati +3 more
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General decay of solutions of a viscoelastic equation
Journal of Mathematical Analysis and Applications, 2007 AbstractIn this paper we consider the following viscoelastic equation:utt−Δu+∫0tg(t−τ)Δu(τ)dτ=0, in a bounded domain, and establish a general decay result which is not necessarily of exponential or polynomial type. This work generalizes and improves earlier results in the literature.
Salim A. Messaoudi
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Natural Image Decay With a Decay Effects Generator
IEEE Access, 2023 We present a novel framework for simulating time-varying decay effects for natural images. Conventional methods assume the input image includes enough decay information and uses the color or texture information of the decayed regions to transfer its effect to the non-decayed regions.
Guoqing Hao +4 more
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Mathematical and Computational Applications, 2021 In the present paper, we consider an important problem from the application perspective in science and engineering, namely, one-dimensional porous–elastic systems with nonlinear damping, infinite memory and distributed delay terms.
Abdelkader Moumen +3 more
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Asymptotic stability of a viscoelastic problem with time-varying delay in boundary feedback [PDF]
Theoretical and Applied Mechanics, 2021 In this paper, we investigate a nonlinear viscoelastic equation. By assuming time-varying delay feedback acting on the boundary, under certain assumptions on the given data, the general decay estimates for the energy are established by introducing ...
Rahmoune Abita
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Mathematical and Computational Applications, 2023 In this paper, we study the long-time behavior of a weakly dissipative viscoelastic equation with variable exponent nonlinearity of the form utt+Δ2u−∫0tg(t−s)Δu(s)ds+a|ut|n(·)−2ut−Δut=0, where n(.) is a continuous function satisfying some assumptions and
Adel M. Al-Mahdi +3 more
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Partial stability analysis of stochastic differential equations with a general decay rate
Journal of Engineering Mathematics, 2021 This paper is concerned with the almost sure partial practical stability of stochastic differential equations with general decay rate. We establish some sufficient conditions based upon the construction of appropriate Lyapunov functions.
T. Caraballo, Faten Ezzine, M. Hammami
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Journal of Function Spaces, 2021 In this work, we consider a quasilinear system of viscoelastic equations with degenerate damping, dispersion, and source terms under Dirichlet boundary condition.
F. Ekinci +3 more
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